JP4723997B2 - Harness wiring structure using a harness protector - Google Patents

Description

The present invention is, for example, relates to a harness wiring structure using the harness protector for a wiring harness in a flat shape between the vehicle body and the door.

  FIG. 6 shows an embodiment of a conventional link door harness wiring structure (see Patent Document 1).

  The link type door 62 is swingably supported on the vehicle body 70 by a single support arm 71 having an approximately L shape. The support arm 71 has high rigidity to support the dead weight of the door 62.

  In addition to the support arm 71, a pair of front and rear link arms 65, 66 are provided in parallel. The base ends of the link arms 65, 66 are pivotally supported by the vehicle body 70, and the distal ends of the link arms 65, 66 are provided. Is rotatably supported by a slider 64, and the slider 64 is slidably engaged with a horizontal guide rail 63 on the door side.

  As a harness support structure, a wire harness 68 is routed from the vehicle body side along the outer surface of the front link arm 66, fixed to the link arm 66 by a holder 72, and a caterpillar following the slider 64 in the guide rail on the door side. It is introduced into the door while being bent in a substantially U-shape or J-shape along the outer casing member 69, and is connected to auxiliary equipment and electrical equipment in the door. The right side in FIG. 6 is the vehicle front side.

  Examples of the auxiliary machine include a power window motor, a door lock unit, a speaker, a door opening / closing drive device, and the like. Link arms 65, 66, a guide rail 63, a slider 64, and an exterior member 69 are employed as a mechanism for absorbing the opening / closing stroke of the door 62 in order to constantly supply power to these auxiliary machines. The exterior member 69 is received by a storage case 67 below the guide rail 63.

  When the door 62 is fully closed, the support arm 71 and the link arms 65 and 66 extend forward, the slider 64 moves to the front end side of the guide rail 63, and one of the wire harnesses 68 is accommodated by the bending operation of the exterior member 69. 67. The wire harness 68 rotates together with the link arm 66.

When the door 62 is fully opened, the link arms 65 and 66 maintain the door half-open state of FIG. 6, the support arm 71 extends rearward, the slider 64 moves to the rear end side of the guide rail 63, and the wire harness 68 is externally mounted. It is pulled out backward together with the member 69.
Japanese Patent Application Laid-Open No. 10-175483 (FIGS. 5 and 9)

  However, in the above-described conventional link type harness wiring structure, the link arm 66 rotates as the door 62 opens and closes, and the wire harness 68 along the link arm 66 bends on the vehicle body 70 side. In particular, when the outer diameter of the wire harness 68 is increased due to a large number of wires constituting the wire harness 68, a difference in bending radius occurs between the inner side and the outer side of the bent portion of the wire harness 68, There is a concern that the bending radius becomes smaller inside the bending and a large bending stress acts on the electric wire, and the bending durability of the wire harness 68 may be lowered.

  The above-mentioned concerns can occur not only in the harness wiring structure of the link type door but also in a portion where a thick wire harness is repeatedly bent in an automobile or the like. Note that the above-described concern is not limited to the case of using a fine wire harness, not limited to a thick wire harness.

In view of the above-described points, the present invention can improve the bending durability of the wire harness at a portion where the wire harness is bent, for example, between the door and the vehicle body. It is an object of the present invention to provide a harness routing structure using a harness protector that can improve reliability.

In order to achieve the above object, a harness routing structure using the harness protector according to claim 1 of the present invention is provided with a harness fixing portion in the protector body, and the wire harness is routed flat in the harness fixing portion. A harness routing structure using a harness protector having a structure in which a plurality of ribs are provided in parallel , wherein the harness protector is provided on a swinging link arm that connects a door and a vehicle body, The wire harness is wired in a flat shape from the harness fixing portion to the vehicle body side, and the flat portion of the wire harness is bent as the door is opened and closed .

  With the above configuration, the electric wires enter and engage between the ribs (the electric wire insertion groove) and the outer side of the outer end ribs, and the ribs prevent the electric wires from moving in the radial direction, thereby making the electric wires flat. It is routed and its condition is maintained for a long time. The bending durability of the wire harness is improved by bending the flat portion of the wire harness in the thickness direction.

Also, the door opens and closes swingably on the vehicle body via the link arm, and the flat part of the wire harness between the harness fixing part of the harness protector and the vehicle body smoothly opens with a small force as the door opens and closes. Bend.

The harness routing structure using the harness protector according to claim 2 is the harness routing structure using the harness protector according to claim 1, wherein the protector body is provided with a harness fixing portion, and the harness fixing portion is provided with a wire harness. setting harness protector of the plurality of ribs for arranging the flat shape is provided in parallel structure to the vehicle body side vignetting, the said wire harness from the link arm side of the harness protector toward said vehicle body side of the harness protector Is arranged in a flat shape.

  With the above configuration, the wire harness is fixed in a flat shape by the harness fixing portion of the harness protector on the link arm side and the harness fixing portion of the harness protector on the vehicle body side, and the flat shape is vibrated by the rib of each harness fixing portion. It is maintained for a long time without being affected by the above. By assembling each harness protector in which the wire harness is inserted and fixed to the link arm or the vehicle body, the flat portion of the wire harness is easily formed.

  According to the first aspect of the present invention, a plurality of electric wires (wire harnesses) are positioned and held by a plurality of ribs, and the plurality of electric wires are maintained in a flat state. When the flat portion is bent in the thickness direction, the bending stress acting on the flat portion may be small, thereby improving the bending durability of the wire harness.

In addition, the wire harness smoothly bends at the flat part when the link door is opened and closed, which improves the bending durability of the wire harness and increases the reliability of constant power supply to the door. Force is reduced.

According to the second aspect of the present invention, the wire harness is maintained in a flat shape between the link arm side harness protector and the vehicle body side harness protector without being affected by the vibration of the vehicle. The bending durability of the wire harness accompanying opening and closing is improved, and the reliability of constant power supply to the door is increased. Further, by assembling each harness protector through which the wire harness is inserted into the link arm or the vehicle body, the flat portion of the wire harness can be easily formed, and the wiring workability of the wire harness is improved.

  1 to 5 show an embodiment of a harness protector according to the present invention and a harness routing structure using the same.

  A link type door 1 in FIG. 1 is supported by a vehicle body 4 by a pair of front and rear parallel link arms 2 and 3 so as to freely swing (turn). The pair of link arms 2 and 3 are formed of a metal material such as iron or aluminum alloy with high strength and rigidity.

  The distal ends of the link arms 2 and 3 are rotatably supported by the door-side link bracket 5 by the shaft portion 7, and the base ends of the link arms 2 and 3 are supported by the vehicle body-side link bracket 6. It is supported so that it can rotate freely. Both link brackets 5 and 6 are arranged in parallel, and a pair of front and rear link arms 2 and 3 and a pair of left and right link brackets 5 and 6 form a parallelogram link mechanism. The link bracket 6 on the vehicle body side is disposed inside the rocker portion 8 of the vehicle body 4.

  1, the right side is the front side of the vehicle and the left side is the rear side of the vehicle. FIGS. 1 and 4 are the fully open state of the door 1 and the fully closed state of the door 1 in FIG. When the door 1 of FIG. 1 is fully opened, the pair of link arms 2 and 3 are opened obliquely rearward with respect to the vehicle body 4, and an opening 9 for getting on and off is formed on the front side of the door 1. A crossing space 10 is formed between the door 4 and the door 1 when the door 1 is fully closed (FIG. 5). When the door 1 is opened and closed, the link arms 2 and 3 are always parallel, and the link brackets 5 and 6 are always parallel and maintain a parallelogram shape.

  A long and rectangular harness protector 11 made of synthetic resin is horizontally disposed on the outer side surface (front side surface) of the front link arm 2. The harness protector 11 is configured by being surrounded by front and rear, upper and lower four wall portions 12a and 12b. A wire harness (a plurality of insulated round electric wires) 14 is inserted into the harness protector 11 with a substantially circular or substantially oval cross section, and one end of the wire harness 14 is opened from the opening (door 1 side) of the harness protector 11. The portion 14a is led out to the door 1 side with a substantially circular cross section, and the other portion 14b of the wire harness 14 is led out to the vehicle body 4 side from the opening 13 at the base end of the harness protector 11 in a substantially flat state.

  The wire harness 14 is wired in a flat shape from the harness protector 11 on the link arm 2 side to the vehicle body 4, and the thickness direction of the flat portion of the wire harness 14 (substitute with reference numeral 14 b) is the wire harness 14 when the door is opened and closed. It matches the bending direction. That is, the harness protector 11 is fixed horizontally to the front vertical side surface 2a of the front link arm 2 in FIG. 1, and the flat portion 14b of the wire harness 4 extends from the harness protector 11 in the thickness direction in the vehicle front-rear direction or the left-right direction. To the vehicle body side in a form in which the width direction is matched with the vehicle vertical direction.

  Due to the flat portion 14b of the wire harness 14, the bending radius of the bent portion 14c of the wire harness 14 at the time of opening and closing the door is not greatly different between the bent inner side and the bent outer side, and the bent radius is made substantially uniform. Thereby, the wire harness 14 is easily bent with a small force, a large bending stress does not act on the bent portion 14c of the wire harness 14, the bending stress acting on the bent portion 14c is reduced, and the bending durability of the wire harness 14 is reduced. Will improve.

  As shown in FIG. 2, a harness fixing plate (harness fixing portion) 38 is integrally provided at the end of the harness protector 11, and a plurality of ribs 40 for electric wire flat wiring are provided on the inner surface of the harness fixing plate 38. It is provided in the protector longitudinal direction (wire insertion direction). The ribs 40 are integrally molded with the harness fixing plate 38 and arranged at equal pitches in the fixing plate width direction.

  The rib 40 of this example extends from the tip 38 a of the harness fixing plate 38 to the front of the opening end 13 of the harness protector 11. Stop protrusions 42 for preventing the tape from being removed are provided on both upper and lower sides of the distal end 38a of the harness fixing plate 38. At the end of the harness protector 11 on the door side, the rib 40 for wiring the electric wire flat is not provided. The harness protector 11 may be referred to as a protector body, and the protector body, the harness fixing plate 38, and the rib 40 may be collectively referred to as a harness protector.

A wire harness (a plurality of electric wires) 14 (FIG. 1) inserted into the harness protector 11 in a substantially circular or substantially oval cross section is fixed in the fixing plate width direction by the ribs 40 of the harness fixing plate 38 as shown in FIG. It is partitioned in a state where it is almost uniformly scattered (in the vertical direction) and maintains a flat shape. In the harness fixing plate 38, the electric wires 15 (15 ₁ , 15 ₂ , 15 ₃ ) are wound and fixed by a binding member such as a vinyl tape 16 or a band.

As shown in FIG. 3, when thick wires 15 ₁ enters engagement with the insertion groove 43 between the ribs 40, the wire 15 _first fixed plate width direction of movement of the first layer is prevented, the first layer side of the wire 15 ₁ of the wire of the second layer overlapping the (rib projecting direction) (wire thick or thin) 15 ₂ are prevented from positional deviation of the fixed plate width direction caught on wire 15 ₁ of the first layer Thus, a large number of electric wires 15 are wired in at least two layers in a flat shape, and the flat shape is permanently maintained by the bending operation of the wire harness 14 when the door is opened and closed.

It is of course possible to place the thick wire 15 ₁ in parallel only in the first layer. It is also possible to place the electric wire 15 ₃ and thicker wires 15 ₁ narrow as shown in FIG. 3 into the insertion groove 43 between the same ribs. Even when thick wires 15 ₁ of the first layer is smaller in diameter than the protrusion height h of the rib 49, the wire of the second layer (thick and thin electric wires) 15 ₂ fixed plate width caught on the tip of the rib 40 Since the displacement of the direction is prevented, each electric wire 15 is wired and maintained in a flat shape.

  FIG. 2 shows an example of four ribs 40, and FIG. 3 shows an example of five ribs 40, but the number of ribs 40 can be set as appropriate according to the number of wires. The number of ribs 40 is not one, but is preferably a plurality (at least two) or more in order to maintain and arrange the plurality of electric wires 15 in a flat shape.

  For example, when the rib 40 is not provided at all in FIGS. 2 and 3, even if the wire harness 14 is wired and fixed to the harness fixing plate 38 of the protector 11 in a flat shape, the wire harness 14 is not flat due to vibration of the vehicle or the like. The cross section is deformed into a substantially oval shape, a circular shape or the like, and the binding vinyl tape 16 or the like is expanded together with the wire harness 14 to a substantially oval shape or a circular shape.

  Further, when one rib 40 is provided at the center in the width direction of the harness fixing plate 38, a large number of the electric wires 15 gather around the rib 40 and are gathered into a substantially oval or substantially circular cross section. 14b cannot be configured.

  As shown in FIG. 1, a second harness protector 29 is provided in the rocker portion 8 of the vehicle body 4, and the wire harness 14 is wired in a flat shape from the harness protector 11 on the link arm side to the harness protector 29 on the rocker side. Yes.

  A harness fixing plate (harness fixing portion) 39 similar to the harness protector 11 on the link arm side and a plurality of ribs 40 for wiring the electric wire flat on the inner surface thereof are also provided on the tip side of the rocker side harness protector 29. ing. The wire harness 14 is wired in a flat shape on the harness fixing plate 39 and is wound and fixed with vinyl tape or the like, and is inserted into a locker-side harness protector 29 in a substantially circular or oval cross section. It passes through the rocker portion 8 through an elastic waterproof grommet 33 and is routed in the vehicle body 14.

  Between the harness protector 11 on the link arm side and the harness protector 29 on the rocker side, the flat portion 14b of the wire harness 14 is covered with a synthetic rubber elastic bellows-like grommet (not shown) to protect or locker side. It is also possible to protect the wire harness 14 between the harness protector 11 and the waterproof grommet 33 by covering it with a bellows-like grommet, a protective tube made of synthetic resin (not shown), or the like.

  In FIG. 1, the door-side portion 14a of the wire harness 14 is raised vertically along the door-side protector 47, and is routed along the inside of the door inner panel 1a via an elastic waterproof grommet (not shown). Has been.

As the door 1 is opened and closed, the wire harness 14 swings back and forth around the rising portion 14a ₁ on the door side protector 47 side, and the rising portion 14a ₁ twists in the circumferential direction to link This corresponds to the rotation of the arm 2. In the door-side protector 47, the wire harness 14 is fixed without slack.

  A portion 14b on the vehicle body side of the wire harness 14 is routed in the harness protector 29 on the rocker side while being routed horizontally with a surplus length along the rocker portion 8 of the vehicle body 4 from the harness protector 11 on the link arm side. Has been. The extra length of the wire harness 14 acts as the bent portion 14c. The flat bent portion 14c is smoothly bent with a large radius from the harness protector 11 on the link arm side to the harness protector 29 on the rocker side when the door 1 is fully opened, and is bent while being folded back with a relatively small radius when the door 1 is fully closed. (FIG. 5), thereby absorbing the harness surplus length smoothly and reliably.

  As shown in FIG. 5, a curved recess 27 a for accommodating the wire harness 14 in a bent state is formed on the side wall 13 of the rocker portion 8 of the vehicle body 4. Interference between the bent portion 14c of the wire harness 14 and the side wall 13 of the rocker portion 8 is prevented by the recess 27a, and the bent portion 14c of the wire harness 14 is impossible with a large bending radius in a limited space in the vehicle width direction in the rocker portion. It can be accommodated.

  The rocker portion 8 is formed of a metal material and has a substantially U-shaped cross section. The rocker portion 8 includes an upper and lower wall portion 30 and an inner side wall 13, and is a horizontal groove portion in the vehicle longitudinal direction surrounded by the three wall portions 13 and 30. 27. A link bracket 6 on the vehicle body side is disposed in the groove 27 and is supported by a vertical shaft 7 so as to be swingable. The link bracket 6 has an inclined stopper wall 28 (FIG. 1) with respect to the rear link arm 3.

  1 and 4, when the door is fully opened, the flat portion 14b of the wire harness 14 extends in a curved shape from the end of the harness protector 11 on the link arm side in the vicinity of the front end of the link bracket 6 to the concave portion 27a. A harness part 14d having a substantially circular or substantially oval cross section following the flat part 14b is routed in the vehicle body via a rocker-side harness protector 29 and a waterproof grommet 33.

  The pair of front and rear link arms 2 and 3 having the same length are formed of a highly rigid metal material in a rectangular cylinder shape, and support the door 1 to the vehicle body 4 and the wiring harness 14 from the vehicle body 4 to the door 1. Plays both the role of the cord. Each of the link arms 2 and 3 is rotatably supported by the left and right link brackets 5 and 6 at the shaft portion 7. The distance between the axial portions of the link arms 2 and 3 is the same. As an example, the opening / closing angle of the link arms 2 and 3 is about 120 °.

  1 and 4, when the door is fully opened, the wire harness 14 is supported by a swinging forward while being fixed by the door-side protector 47, and straightly forward obliquely along the harness protector 11 on the link arm side. It is routed and pulled toward the rocker portion 8 while smoothly curving with a large bending radius from the harness protector 11 to the rocker portion 8 of the vehicle body 4.

  When the door 1 is closed forward as shown in FIG. 5 from the fully opened door of FIG. 4, the wire harness 14 is fixed by the protector 47 on the door side and swings backward in front of the shaft portion 7 on the front side of the link bracket 5. In the harness protector 11 on the link arm side, it is located obliquely rearward along the link arm 2 on the front side.

  The wire harness 14 is bent while being folded back into a substantially U or J shape at a portion led out from the harness protector 11 on the link arm side toward the vehicle body (the bent portion is indicated by reference numeral 14c). The bending excess of the wire harness 14 absorbs the harness surplus length. In particular, since the harness bending portion 14c is flat and the bending radius does not change so much between the outer side and the inner side of the bending, the bending is performed smoothly and smoothly with a small bending stress, thereby improving the bending durability of the wire harness 14. To do.

  Further, from the door fully closed state shown in FIG. 5 to the door fully opened state shown in FIG. 4, the wire harness 14 has a bend portion 14c led out from the harness protector 11 on the link arm side to the vehicle body side with a large bending radius. The extra length is absorbed while curving gently. Also in this case, since the harness bending portion 14c is flat and the bending radius does not change so much between the outer side and the inner side of the bending, the bending is performed smoothly and smoothly with a small bending stress, whereby the bending durability of the wire harness 14 is improved. Will improve.

  Further, since the extra length of the wire harness 14 is generated and absorbed on the vehicle body side while the wire harness 14 is fixed on the door side, the harness extra length absorbing structure is simplified and reduced in cost.

  In the above-described embodiment, the wire harness is wired in a flat shape between two harness protectors. For example, the wire harness 14 is wired in a flat shape only in one harness protector 11 (of the flat portion 14c). It is also possible to wire one side to the harness protector 11 and directly route the other flat portion 14c to the vehicle body or the like without using the harness protector 29 on the vehicle body side.

  Further, in the above embodiment, the rib 40 having a rectangular cross section as shown in FIGS. 2 and 3 is used. However, for example, a mountain-shaped rib (not shown) is formed, and each rib has a wave shape on an arc surface. It is also possible to form a wire insertion groove having a circular arc cross section. The shape, length, and the like of the rib 40 are not limited to these, and are appropriately set as necessary. Further, the pitch of the ribs 40 does not necessarily have to be the same pitch corresponding to the wire diameter or the like.

  Moreover, in the said embodiment, although the harness holding plate 38 protruded and provided the rib 40 in the harness holding plate 38 at the edge part of the harness protector (protector main body) 11, it does not make a harness holding plate protrude, It is also possible to provide it inside the harness protector 11. For example, a pair of slits (not shown) parallel to one wall portion (wall portion in contact with the link arm 2 in the example of FIG. 1) 12a is provided, and the harness is held between the pair of slits. A plate (harness fixing portion) is formed, a plurality of ribs 40 are provided on the harness holding plate, and the vinyl tape 16 or the like is wound around the flat portion 14b of the wire harness 14 inside the harness protector 11 through a pair of slits. It is also possible. It is also possible to provide a pair of holes through which a flexible band passes instead of a slit.

  Moreover, in the said embodiment, although the rectangular cylindrical harness protectors 11 and 29 were used, it is also possible to make the shape of a harness protector circular, triangular shape, trapezoid shape, etc. Even in the case of a circular shape, flat harness fixing plates (harness fixing portions) 38 and 39 are provided.

  Moreover, in the said embodiment, although the harness protectors 11 and 29 which hold | maintain the wire harness 14 in flat shape were applied as a feed structure of the link type door 1, it was between two harness protectors 11 and 29 or one harness. The structure in which the wire harness 14 is wired in a flat shape between the protector 11 and the vehicle body is not limited to the link type door 1, and is, for example, an up / down open / close back door, a left / right open / close front door, and a rear door. It can also be applied to doors other than automobiles.

It is a perspective view which shows one Embodiment of the harness protector which concerns on this invention, and a harness wiring structure using the same. It is a principal part perspective view which similarly shows one Embodiment of a harness protector. It is a longitudinal cross-sectional view which shows the state which wired the wire harness to the harness protector in flat shape. It is a top view of the door full open state which shows the harness wiring structure using a harness protector. It is a top view of the door fully-closed state which shows the harness wiring structure using a harness protector. It is a perspective view which shows one form of the harness wiring structure of the conventional link type door.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door 2, 3 Link arm 4 Vehicle body 11, 29 Harness protector 14 Wire harness 14b Flat part 38, 39 Harness fixing plate (harness fixing part)
40 ribs

Claims (2)

A harness wiring structure using a harness protector having a structure in which a harness fixing part is provided in the protector body, and a plurality of ribs for wiring the wire harness in a flat shape is provided in parallel to the harness fixing part ,
The harness protector is provided on an oscillating link arm that connects the door and the vehicle body, and the wire harness is routed in a flat shape from the harness fixing portion to the vehicle body side. A harness routing structure using a harness protector , wherein the flat portion of the wire harness is bent . Harness fixing portion is provided in the protector body, the harness harness protector of the fixed portion to the wire harness plurality of ribs for arranging the flat shape is provided in parallel structure set eclipse to the vehicle body side, wherein harness wiring structure using the wire harness from the link arm side of the harness protector toward said vehicle body side of the harness protector the harness protector according to claim 1, characterized in that it is routed in a flat shape.

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